This list of the prehistoric life of Maryland contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Maryland.
Precambrian The Paleobiology Database records no known occurrences of Precambrian fossils in Maryland.
Paleozoic
Selected Paleozoic taxa of Maryland †Amphiscapha †Amplexopora †Archimylacris †Atrypa †Atrypa reticularis – report made of unidentified related form or using admittedly obsolete nomenclature †Aviculopecten †Bassipterus †Bellerophon †Calymene †Calymene camerata †Calymene cresapensis †Calymene niagarensis – or unidentified comparable form †Camarotoechia †Camarotoechia andrewsi †Camarotoechia litchfieldensis †Camarotoechia tonolowayensis †Chonetes †Chonetes novascoticus †Cincinnetina †Cincinnetina multisecta †Clitendoceras †Composita †Composita ovata – tentative report †Cornulites †Cypricardinia †Cypricardinia elegans †Dakeoceras †Dalmanites †Dalmanites limulurus †Dolichopterus †Edmondia †Eldredgeops †Eldredgeops rana †Ellesmeroceras †Encrinurus †Eospirifer †Erettopterus – tentative report †Euomphalus †Eurypterus †Eurypterus remipes †Favosites †Favosites niagarensis – or unidentified comparable form †Flexicalymene †Goniatites †Gyrodoma †Hallopora †Holopea †Hyolithes †Isotelus †Lingula †Lysorophus †Mcqueenoceras †Megamolgophis †Meristina †Metacoceras †Naticopsis †Neospirifer †Neospirifer dunbari – tentative report †Obolella †Obolus – tentative report †Olenellus †Ormoceras †Orthoceras †Platyceras †Proterocameroceras †Pterygotus †Ribeiria †Rioceras Solemya † Solenopsis †Sowerbyella †Spirifer †Spirifer vanuxemi †Stenosiphon †Strophomena †Tainoceras †Tentaculites †Trigonocera †Trimerus †Waeringopterus †Worthenia
Mesozoic
Selected Mesozoic taxa of Maryland Acirsa †Acrocanthosaurus – or unidentified comparable form †Acteon †Aenona †Agerostrea †Allognathosuchus – or unidentified comparable form †Allosaurus †Amyda †Ancilla †Anomia †Anomoeodus Arrhoges Astarte †Astrodon †Astrodon johnstoni – type locality for species †Baculites †Baculites baculus †Bottosaurus †Bottosaurus harlani Botula †Botula conchafodentis †Botula ripleyana Cadulus Caestocorbula †Caestocorbula crassaplica †Caestocorbula crassiplica †Caestocorbula percompressa †Caestocorbula terramaria Carcharias †Caveola †Ceratodus Cerithium Chiloscyllium †Cimoliasaurus †Coelosaurus †Coelosaurus affinis †Coelosaurus antiquus †Coelurus †Coelurus gracilis – type locality for species †Corax Corbula †Crenella †Crenella elegantula †Crenella serica †Cretolamna †Cretolamna appendiculata Cucullaea †Cucullaea capax Cuspidaria †Cuspidaria ampulla Cylichna †Cylichna diversilirata †Cylichna incisa †Cylindracanthus †Cymella Dasyatis †Deinonychus †Deinonychus antirrhopus †Deinosuchus †Deinosuchus rugosus †Dentalium †Dentalium leve †Discoscaphites †Discoscaphites conradi †Discoscaphites gulosus †Discoscaphites iris †Egertonia †Enchodus †Enchodus dirus †Eulima †Eulima monmouthensis †Euspira †Eutrephoceras †Ewingia †Exogyra †Exogyra costata Galeorhinus Ginglymostoma Glossus Glycimeris Glycymeris †Glycymeris rotundata †Glyptops †Goniopholis †Grallator – or unidentified comparable form †Halisaurus †Halisaurus platyspondylus †Hamatia – type locality for genus †Hamulus Heterodontus † Heteromorpha †Hoploparia †Hybodus †Hyposaurus †Hyposaurus rogersii †Inoceramus †Ischyodus †Ischyrhiza †Ischyrhiza avonicola – or unidentified comparable form †Ischyrhiza mira †Jeletzkytes †Jeletzkytes nebrascensis Latiaxis Lepisosteus Lima Limatula †Linearis Lithophaga Lopha †Lopha falcata †Lopha mesenterica †Mathilda †Modiolus †Modiolus sedesclaris †Modiolus sedesclarus †Modiolus trigonus †Morea †Mosasaurus †Mosasaurus conodon Myliobatis †Mytilus – tentative report Nebrius Nucula †Nucula camia †Nucula cuneifrons †Nucula percrassa †Nucula severnensis Odontaspis †Osteopygis Panopea †Paralbula †Peritresius Pholas †Pinna †Placenticeras †Pleurocoelus – type locality for genus †Pleurocoelus nanus – type locality for species †Plicatoscyllium Polinices †Priconodon – type locality for genus †Priconodon crassus – type locality for species †Prognathodon †Prognathodon rapax †Propanoplosaurus – type locality for genus †Propanoplosaurus marylandicus – type locality for species †Protocardia †Pteria †Pterotrigonia †Pterotrigonia eufalensis †Pterotrigonia eufaulensis †Pterotrigonia thoracica †Ptychotrygon Pycnodonte †Pycnodonte vesicularis Raja Rhinobatos †Rhombodus Ringicula †Ringicula clarki †Ringicula pulchella Rissoina †Sargana †Scaphites †Scaphites hippocrepis Serpula †Serratolamna †Serratolamna serrata †Sphenodiscus †Sphenodiscus lobatus †Sphenodiscus pleurisepta Squalicorax †Squalicorax falcatus †Squalicorax kaupi †Squalicorax pristodontus Squatina †Stephanodus Tellina †Tenea †Tenontosaurus †Thoracosaurus Trachycardium †Trachycardium eufaulensis Turritella †Turritella bilira †Turritella hilgardi †Turritella paravertebroides †Turritella tippana †Turritella trilira †Turritella vertebroides †Zephyrosaurus
Cenozoic
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